铁路技术设备的养护维修工作，应实现（），严格责任制和检验制，

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问题多项选择题

铁路技术设备的养护维修工作，应实现（），严格责任制和检验制，坚持以预防为主、检修与保养并重、预防与整治相结合的原则，合理确定检修项目和检修周期，组织定期检查，加强日常维修，提高设备质量。

A、机械化

B、自动化

C、专业化

答案

参考答案：A,B,C,D

改错题

Everyone can do something for our environment. For me, I

小题1:___________　

should try to save electricity in my daily life. For an example,

小题2:___________

if I am the last person leave the classroom in the evening,

小题3:___________

I will always remember to turn on the lights. In order to

小题4:__________

protect our forests, I will use paper wise. I should try

小题5:___________

to use all sides of paper whenever it is possible. I will

小题6:___________

not use things like paper cup and disposable chopsticks

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because they are made up of wood. I believe that doing all

小题8:___________

these small things will improve our environment but help

小题9:___________

making our world a better place to live in.

小题10:___________

单项选择题

螃蟹和虾的幼虫被叫作（）。

A、无节幼虫

B、叶状幼虫

C、三蚤状幼虫

D、甲壳幼体